Hinge last



March 19, 1929.

c. L. STURGIS amen LAST Filed March 26, 1928 application of A. G. Fitz.

Patented-Mar. 19, 1929.

yon-arse. stares I 1 1,705,594 rarssrorrics;

CARL L. S'IURGIS, or BROCKTON, Massacnnsnrrs, Assrenon TO "rim-EMPIRE- DOUBLE PIVOT Lasr COMPANY, or lineman-MAINE, A conronarron or MAINE.

. HINGE Application filed. March 26,

movement of the .fore part and heel part.

around a pivotalcenter is resiliently opposed by aforcewhich increases during the first part of lastscollapsing movement at least. The re silient resistance in some such lasts diminishes after the collapsing movement has proceeded to a substantial extent, while in others it increases steadily up to the limit of collapse, thus tendingto restore the last automatically to extended position when collapsed. Such a last is shown in United. States Letters Patent. No. 784,149, granted March 7, 1905, on the It is an object of the present invention to provide a satisfactory last of the latter type which will contain a minimnm numher of parts and which, in this and other respects, will be cheap to manufacture; To this end, the invention providesa 'novel hinged last having a hinge plate connecting its forepart and heel part, the plate having a projection engaging aspring in the forepart and being arranged to compress the sprin'gmore and more as the last is collapsed, together with ioint surfaces on the two last parts, co-operof a last embodying the invention in oper- A vativc extended condition; and

I of the heel part, the knuckle and groove beating to hold them firmly against twisting stresses.

These and other features of the invention comprising certain combinations and arrangements of parts will be apparent from the following.description of a preferred e1nbodimcnt of the invention shown in the drawingsainivhich r I Fig. 1 is a side elevation,'pai'tly in section,

Fig. 2 shows the last in collapsed condition; j

The illustrated last comprises a forepart 10 and a heel part 12 separated by a cut comprising an open V 14 at the top of the last. A circular kunckle 16 on the forepart fits a similar circular groove 18 on the front face ing connected by steps 20 to short vertical opposed faces 22 which run out into the bottom of the last. The steps 20 holdthe last parts firmly against twisting stresses. Vertical kerfs 24, 26 are sawed into the meet- 7 ing faces of the forepart and. the heel part, and a hinge plate 28 is mounted fixedly in the heel partby means of two pins-30, 32,

. to side.

LAST.

I 1928. Serial no. 264,933. 1

extending through the heel part from side forepart and the lower front corner of the plate 28, thus furnishing a pivot around which the heel part and its attached plate 28 swing in collapse. r i

The upper front corner 3% of the plate 28 is undercut to form a'shoulder 36which rests against a headed pin 38 having its shank lo-. cated within a spiral spring l0 arranged to A third pin 33 located at the center of the knuckle 16-18 passes through the be compressible in a hole 42 communicating with the kerf 24 in the fore'part. The shoulin contact with the pin 38 at all times as it swings around the pin 32 in the collapsing movement.

der 36 is sufiiciently long so that it remains,

Therefore the, restoring force" of the spring 40, tending to extend-the last, increases continually as the collapsing-move ment proceeds, so that the 'la st will immediately snap back to extended position when the collapsing stress is removed. i

Having thus described my invention, what I claim as new. and desireto secure by Let- 1 ters Patent of the UnitedStatesis An imp ositive lock hingelast comprising a forepart, a heel part having a cylindrical recess in itsfront face, 'a knuckle ofcyli'n drical outline formed on the rear end of the forepart and arranged to .fit into the'said circular recess, a horizontal shoulder on each said last part connected with the lower endsof'said cylindrical surfaces respectively and extending rearwardly therefrom, copper-at ing vertical faces, 01 6011 each last part, extending, from the rear ends of the shoulders tothe bottom of the last, the heel part and forepart respectively being provided with di verging flat surfaces extending from the'uptivelyto the upper surface ofthe last, the

per ends of said cylindrical-surfaces respecopposed faces of the forepart and the heel part having each a vertical kerf formed therein and the forepart having" a cylindrical hole extending downwardly and forwardly from the kerf 1n the forepart intothe instep portion of the forepart, a substantiallyrectangular hinge plate fixedlyanchoredin the i kerf in the heel part and extending'into the kerf in the forepart, the hinge plate having a hole positioned opposite the center ofthe cylindrical knuckle in-the forepart and having *anupper "corner provided with a forwardly extending-shoulder, ahinge pin at the" fl center of theknuckle in the forepart' and extending threugh thee-aid hole to connect the last parts" pivotally, a spiral spring located in the first mentioned hole, and a headed pin having it sishank loceted inthe axis of the spring and ebuttihgiagaihst the shoulder 01y the hinge plate, the shoulder being of length sufiielent t0 remaln contlnuously' in Contact with the pin as the heel part swings about the lno vement of the last parts. I

1n testimony Whereofha-ve slgned my name to this speelfieatlon.

CARL L. s UReIs" 

